From owner-freebsd-questions@FreeBSD.ORG Thu Sep 17 17:46:20 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 267DD1065695 for ; Thu, 17 Sep 2009 17:46:20 +0000 (UTC) (envelope-from mail25@bzerk.org) Received: from ei.bzerk.org (tunnel490.ipv6.xs4all.nl [IPv6:2001:888:10:1ea::2]) by mx1.freebsd.org (Postfix) with ESMTP id 9476E8FC28 for ; Thu, 17 Sep 2009 17:46:19 +0000 (UTC) Received: from ei.bzerk.org (BOFH@localhost [127.0.0.1]) by ei.bzerk.org (8.14.2/8.14.2) with ESMTP id n8HHkEQR034810; Thu, 17 Sep 2009 19:46:14 +0200 (CEST) (envelope-from mail25@bzerk.org) Received: (from bulk@localhost) by ei.bzerk.org (8.14.2/8.14.2/Submit) id n8HHkEBW034809; Thu, 17 Sep 2009 19:46:14 +0200 (CEST) (envelope-from mail25@bzerk.org) Date: Thu, 17 Sep 2009 19:46:14 +0200 From: Ruben de Groot To: Anselm Strauss Message-ID: <20090917174614.GB34712@ei.bzerk.org> Mail-Followup-To: Ruben de Groot , Anselm Strauss , Steve Bertrand , freebsd-questions@freebsd.org References: <7E2DB08A-9E11-47D7-904D-9F3D8490868E@gmail.com> <4AB22B09.4070507@ibctech.ca> <29722c130909170735w24886ac9j8c5faaed15d17bb9@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <29722c130909170735w24886ac9j8c5faaed15d17bb9@mail.gmail.com> User-Agent: Mutt/1.4.2.3i X-Spam-Status: No, score=-4.4 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 autolearn=ham version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on ei.bzerk.org X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.0.1 (ei.bzerk.org [127.0.0.1]); Thu, 17 Sep 2009 19:46:18 +0200 (CEST) Cc: Steve Bertrand , freebsd-questions@freebsd.org Subject: Re: ZFS on small systems X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Sep 2009 17:46:20 -0000 On Thu, Sep 17, 2009 at 04:35:37PM +0200, Anselm Strauss typed: > Thanks for your advice, Steve. > > I looked a bit at the source code and in > /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c and I > found this: > > /* set min cache to 1/32 of all memory, or 16MB, whichever is more */ > arc_c_min = MAX(arc_c / 4, 64<<18); > > Could this mean that 16 MB are already enough to run ZFS? I seriously doubt it. Ruben